Love this Thread so far. Or really far.
I saw you mentioning leaf batteries earlier. I think that would be an AWESOME IDEA. Theres a place I found selling them for somewhat cheap.
NEW Vectrix Lithium Conversion 9kW/h Battery Pack 136V/60Ah - 18 Nissan Leaf Modules
They also have 12KWH half packs from leafs but are out of stock. Its essentially 2500$ for 10KWH. Order 4 and you'd have essentially 2 leafs worth of power for 10k not too shabby.